Controllable tuning of energetic crystals by bioinspired polydopamine
Controllable tuning of energetic crystals by bioinspired polydopamine
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通过仿生聚多巴胺可控调节高能晶体
DOI：
10.1016/j.enmf.2020.09.002
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发表时间：
2020
影响因子：
--
通讯作者：
Shaoyun Guo
中科院分区：
文献类型：
--
作者：
Congmei Lin;Shijun Liu;Wen Qian;Feiyan Gong;Xu Zhao;Liping Pan;Jianhu Zhang;Zhijian Yang;Jiang Li;Shaoyun Guo
不敏感高爆剂1,3,5-三氨基-2,4,6-三硝基苯（TATB）及其基配方广泛应用于民用和国防领域。然而，它在受热和大外力作用下会发生高度变形，从而导致致命缺陷，限制了它在现代武器中的应用。受贻贝的启发，我们选择聚多巴胺（PDA）通过一步-原位聚合工艺涂覆TATB。PDA膜在TATB颗粒上的涂覆动力学取决于实验参数。多巴胺溶液初始浓度和反应温度的升高有利于PDA的聚合和沉积。通过将反应空气气氛改为氧气气氛，可以观察到加速沉积动力学。因此，可以通过调节反应条件来控制PDA壳的含量。结构表征证实了核壳复合材料的形成，具有均匀致密的壳层。多巴胺在爆炸物表面沉积动力学的研究为具有官能团层的含能材料的可控表面修饰提供了一种潜在的方法。
Insensitive high explosive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) and TATB-based formulations are widely used in civil and defense applications. However, it undergoes high deformation on exposure to heat and large external force, which leads to fatal defects, limiting its application in modern weapons. Inspired by mussels, polydopamine (PDA) was selected for coating TATB through a one-stepin-situpolymerization process. The kinetics of the PDA film coating onto TATB particles depended on the experimental parameters. The increase in the initial concentration of dopamine solution and reaction temperature facilitated PDA polymerization and deposition. The accelerated deposition kinetics could be observed by altering the reaction air atmosphere to an oxygen atmosphere. Therefore, the content of the PDA shell could be controlled by adjusting the reaction conditions. Structural characterizations confirmed the formation of core-shell composites with a uniform and compact shell layer. Study of the kinetics of dopamine deposition on explosive surfaces provides a potential method of controllable surface modification of energetic materials with functional group layers.